Патент USA US2284511код для вставки
May 26, 1942. H. CHRISMAN 2,284,511 “METER SEAL Filed Aug. 23, 1939 , ' E291 ' ' 22 24 o 35 ' Z0 Z1 13 15 U 24 12 J0 111 H \\KLJL F592. . .21 v v * : w ...... w I '//T&\\\\\~’I4 I m \ 726 J6’ INVENTOR. 1 BY 66/006 66/250290. Patented May 26, 1942 g‘ _ _ 2,284,511 UNITED STATES PATENT OFFICE 2,284,511 METER SEAL Horace Chrisman, Edgewood, Pa., assignor to Pittsburgh Equitable Meter Company, Pitts burgh, Pa., a corporation of Pennsylvania Application August 23, 1939, Serial No. 291,557 2 Claims. (01. 73-272) This invention relates to improvement in liquid meters, and relates particularly to im proved means for sealing the register chamber drives the spindle 13 in known manner. The spindle l3 drives a dog I4 which in turn drives the reduction gearing mounted in case IS, the last element of the gear train having a spindle from the meter chamber. 16 extending from the case. Spindle It at its In meters for the measurement of liquids, par ticularly of the nutating disc type, heretofore outer end carries a pin or driving dog I‘! pass ing through a thrust collar I1’ and engages in a stu?ing box has been provided between the reduction gearing and register to prevent leak the slots I8 of a driven crank member 19 secured on a shaft 20 passing through a dividing wall age from the gearing chamber into the register case. The disadvantage accompanying the use 10 2| of the case and having a gear 22 at its upper end meshing with the gear 23 which drives the of a stuffing box of conventional construction register train 24. The wall 2! has a downwardly at this point is that any variation in frictional projecting boss 25 providing a sealing surface 26 resistance to turning of the register spindle by which is accurately machined. The driven dog the stu?ing box will affect the accuracy of the l9 carries a washer 21 of rawhide or other suit meter, and furthermore a stuiling box of this type has the disadvantage that it produces a able material in engagement with the surface 26 of boss 25, the washer 21 being surrounded considerable drag or resistance to turning of by a cup 28 containing a suitable ?uid or viscous the meter, which interferes with accurate op lubricant. Preferably the ?ange or upper mar eration. In an attempt to minimize these dis advantages, it has been the practice to apply ‘ gin of the cup 28 extends above the plane of the stuffing box to the slowest moving spindle the washer 2'! so as to maintain the body of lubricant adjacent the washer and the surfaces of the gear train. abutting the washer. A spring 29, which is In accordance with the present invention, I shown as of tapered helical form, abuts the provide a sealing member between the gear train case and the register case comprising a rotating driven crank member [9 at one end and abuts member abutting a sealing surface and held in shaft 16 at the other end, and thus maintains the rawhide washer 21 in sealing engagement engagement therewith by a spring that rotates with the surface 26 of boss 25. with said rotating member. A washer of rawhide or other soft, porous material is inserted be— The construction above described seals the tween the rotating member and sealing surface. 30 register driving spindle 20 against leakage with Preferably, a supply of lubricant is provided out undue friction. Due to the porosity of the adjacent the periphery of the rotating member rawhide washer, a certain amount of lubricant in a cup which is mounted on the register driv is conveyed to the surface 26 and to the journal ing spindle and is rotated from the reduction of spindle 20, but no liquid is permitted to pass gearing by a suitable dog and crank arrange therethrough due to the presence of lubricant in the surrounding cup. In operation the pressure ment or any other suitable structure. The ro tating member is maintained in engagement with inside case In holds the washer 21 in sealing en the sealing surface by means of a spring which gagement with surface 26. However, the spring rotates with the rotating member. The cup 29 is provided to insure contact of the sealing shape of the lubricant containing member main 10 surfaces at all times, and therefore need be only tains the lubricant in position’ without danger very light. The spring thus maintains contact of being spilled or washed away. between the sealing members even when the The invention will be described in detail in meter is not in service. A further advantage is connection with the accompanying drawing, that the resistance to turning of the seal re wherein I have shown a preferred embodiment -' mains substantially constant and cannot be changed by any exterior adjustment. of the invention by way of example, and where in It will be apparent that various modi?cations Figure 1 is a view in vertical section of a meter may be made in the invention without departing having my invention applied thereto, and from the spirit or scope thereof, as the modi?ca Figure 2 is an enlarged vertical section of a ticn herein described is intended to be illustrative detail of Figure 1. ' only of the invention. What I claim as my in Referring to the drawing, there is shown a vention and desire to secure by Letters Patent is: water meter casing indicated generally by the 1. In a fluid meter comprising a meter casing numeral [0 having a meter chamber H therein containing a metering element and a reduction with a mutating disc I2 in the chamber which gear train driven thereby, a register case divided 2 azeasn by a wall from said meter casing and a register containing a metering element and a register driving spindle driven by said gear train passing through said dividing wall the improvement wherein said dividing wall has a sealing surface, case divided by a wall from said meter casing, the improvement wherein said wall has a sealing surface, a register driving spindle driven by said a sealing Washer surrounding said spindle and 5 metering element passing through said dividing engaging said sealing surface, means driven from wall and having an abutting surface, a sealing said gear train backing said Washer, spring washer of soft porous material interposed be means between said gear train and backing means tween said sealing surface and abutting surface for urging said washer into engagement with and a cup having a ?ange extending above and said sealing surface; and a cup carried by said 10 surrounding said washer and rotatable with said spindle having a ?ange extending above and sur rounding said washer for containing lubricant. 2. In a ?uid meter comprising a meter casing _ spindle for containing lubricant. HORACE CHRISMAN.